\begin{tikzpicture}
	\tkzDefPoints{0/0/A, 2/1/B, 2/0/C, 0.3/1.3/D}
	\tkzDrawPoints[fill=black](A,B,C,D)
	\tkzLabelPoints[above](D)
	\tkzLabelPoints[right](B,C)
	\tkzLabelPoints[below](A)
\end{tikzpicture}

